Oscar wauthier



Mar. 27, 1923, 1,449,567

0. WAUTHIER CRUSHING, BREAKING OR GRINDING MACHINE FOR THE PULVERIZATION OF MINERALS 1 Filed Apr. 15, 1914. @5 1.

Patented Mar. 27, 1923.

UNITED STATES v 1,449,567 PATENT OFFICE.

OSCAR WAUTHIER, OI BRUSSELS, BELGIUM.

CRUSHING, BREAKING, OR GRINDING MACHINE FOR THE PULVERIZATION OF MINERALS.

Application filed April 13, 1914. Serial No. 831,587.

T (ZZZ whom it may concern Be it known that I, OSCAR WAUTHIER, a subject of the King of the Belgians, residing at Brussels, Belgium, 131 AvenueAlbert, have invented certain Improvements in Crushing, Breaking, or Grinding Machines for the Pulverization of Minerals, of which the following is a specification.

The present invention relates to improvements in crushing, breaking or grinding machines for the pulverization of minerals and has for its object to increase the efficiency of the machine, to lengthen its useful life, and to avoid the breakage of the pulverizing members when materials of too great hardness are passed through the machine. lVith this object in view, the invention consists of a novel combination of parts comprising pivoted breaking hammers mounted in pairs between two discs rigidly secured on a rotary shaft, so that the said hammersare projected towards the outer casing of the machine by the centrifugal force consequent upon the rotation of said shaft. The combination forming the sub ject matter of the invention further comprises a plurality of removable corrugated hard steel segments forming a circumferential lining for the casing of the machine,

against which lining the materials are projected by the centrifugally influenced hammers after being acted upon by the latter, so that the said lining and the said hammers cooperate in breaking and disintegrating the materials treated. As the hammers can turn freely about their bearing pins when a hard substance offers too great a resistance to breakage, the said hammers will yield sufficiently to allow the substance to 4 pass, so that no damage to the machine results.

A centrifugal crushing or grinding machine embodying, the invention is illustrated in the accompanying drawings, in which:

Fig. 1 is a vertical section of the breaking machine,

Fig. 2 is a section of the line A-B of Fig. 1,

Fig. 3 is a view of the joint between the two parts of the frame or casing,

Fig. 4 is an elevation of one of breaking hammers, and

Fig. 5 is a vertical section of the line C-D of Fig. 4:.

The machine mainly consists of a hard the steel cast iron frame entirely armour plated on the lnslde and constructed in two parts, of

which the upper part A forms a cap or cover and the lower part B forms the body and rests on the concrete foundation.

The two parts of the framework are connected together in known manner by means of a double hinge C having removable pins, and a jointing (Fig. 3) consisting of a strip of felt D fittlng the lower part is provided between the two parts of the frame and prevents the leakage of any dust. A leather joint E is provided at each of the points where the shaft passes through the frame and these joints also serve to prevent the outlet of dust. The hmging of the two parts of the frame allows easy access to the interior of the machine as the upperpart or cap can be lifted by removing either one of the removable hinge pins and swinging back the cap about the other hinge; a lifting tackle can be used for the purpose and may be attached to one of the rings fixed to the cap.

The lower part of the frame carries the main shaft which is supported in two bearings of large surface, provided with bushings or steps of anti-friction metal and aumatic rin lubrication. The shaft rotates at a speed of 400 to 1000 revolutions per minute and is driven by means of a belt and pulley, the pulley being keyed to one end of the shaft.

A hard steel drum G formed of two discs H, also of steel is fixed on the main shaft, and holes a, b, c, d,'e, f, are drilled in the discs H, to form bearings for the pins about which the hard steel hammers I are hinged. These pins are indicated by the letters a, b, c, d, e, f. This method of fixing the hammers allows them to rotate or swing and prevents their breakage or injury when substances of extreme hardness pass between the hammers and the armour plates of the outer casing. The hammers yield and consequently will last until the striking surface is entirely worn out.

On each of the bearing pins a, b, c, d, c, f are hinged one or more hammers I (two are shown in the present instance) according to the size of the machine, the substance to be broken up, and the degree of fineness of which the substance has to be reduced. The crushing hammers may be cast integrally or be constructed in two pieces into a groove or recess in 5. The central part 1 represents the hammer head or block subject to wear. This head or block is of prismatic section and may be fixed between twoarms I by means of a square key or fixing pin I passing longitudinally through the hammer block and the two arms, and the key is prevented from longitudinal movement by means of a split pin or cotter pin 1 driven into one of its ends. By means of this arrangement it is possible to replace the hammer head when it becomes worn out. A hearing sleeve 12 for the passage of the bearing pin is cast integral with the ends of the arms I opposed to the hammer block.

A stepped joint J formed in known man: ner between the external rims of lateral annular lining flanges 8, 8,.-9 and 9 and the circumferential edges of the discs H, prevents the passage of lumps above a certain size, so that only dust can pass through, and does so without becoming clogged. 1t therefore falls straight through the machine to the outlet K together with the broken material.

In operation,

as shown in Fig.

the centrifugal force compels the hammers to strike the material to be crushed which is broken by their heads or blocks and then projected against corrugated hard steel segments 1, 2, 3, 4 forming a circumferential armour plated lining for the outer casing so that the material can be crushed very finely.

All the segments 1, 2, 3, 4 of said lining are removable and the subdivision of this lining is such that any one of the said segments can be dismantled, removed or replaced by a single man.

The machine, as described, is suitable for crushing minerals of all kinds and of all degrees of hardness, such as pyrites, lime stone, emery stone, sand stone, porphyry, slag, phosphates, superphosphates, ochres, flint, glass, quartz, coal, etc.

One, two or more may be used according to the degree of fineness to which the material is required to be crushed; the steel hammers may be of dihammers on each pin.

mensions and weight suited tothe speed at which the machine is to be driven and the output to be obtained. The output of the machine is large, and only a comparatively small amount of power is required to drive it; the floor space occupied by the machine is not extensive. Further, the amount of wear suffered by the working parts is small in proportion to the large output of the machine.

I claim:

1. In a centrifugal crushing or grinding machine, the combination of a casing having circular corrugated solid metal segments removably secured to the casing and forming a circumferential lining therefor; a pair of hard steel discs firmly secured on the rotary shaft and forming a partial end lining for said casing; a circumferential set of transverse bearing pins removably carried by said discs; and a set of metal hammers pivotally mounted in pairs on said bearing pins between aforesaid discs each hammer consisting of a pair of radial arms and a breaking-block of prismatic section extending between one of the ends of said pair of arms, and a hollow bearing sleeve cast integral with and extending between the other ends of said arms; substantially as described.

2. In a centrifugal crushing or grinding machine as claimed in claim 1, pivoted hammers having a .cored breaking-block maintained in position between the corresponding ends of the hammers radial arms by means of a non-projecting square fixing pin and a split pin passed through the end of said fixing pin, suitable recesses being formed in the said arms for the said splitpin and the head of said fixing pin, substantially as described.

In testimony whereof I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

I OSCAR WAUTHIER.

Witnesses:

CHARLES A. JOHNSON, CHAs. ROY NASMITH. 

